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diagram of the human kidney with labels

The LS of kidney shows outer dark zone called the cortex and inner pale red zone called medulla which forms the main mass of the kidney. The medulla is made of number of pyramidal structures containing renal tubules or Nephrons projecting into the cavity towards the inner region of kidney called pelvis.This is the region where renal artery and renal vein enter the kidney. Free end of pelvis shows cup like depressions called calyces. Renal pyramids of medulla project into these calyces.Now…

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a diagram of the human skull with labels on it

The skull is composed of two sets of bones cranial and facial. Cranial bones are 8 in number, facial bones are 14. So, skull is made of total 22 bones. The cranial bones form brain box called Cranium which accommodates the brain. The facial bones give shape to the face. Now, lets see how we can draw a Human skull in simple easy steps. 1. Draw a arbitrary rectangular shape as shown. 2. Draw lower Jaw shape as shown. 3. Merge the two shapes as shown. 4. Draw Now, the shape of fore head…

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an image of a diagram of the inside of a tooth

Teeth are structures useful for biting, tearing, chewing and grinding. All mammals have more or less same construction of tooth.A vertical section of a tooth shows three parts viz the crown, the neck and the root. Crown is the part lying above the gum, the neck is the part in level with the gum and the root is the part buried in the sockets of the jaw bones. The white part of the tooth is known as the enamel. This is the hardest substance present in the body. The enamel is the non living…

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diagram of the lungs with labels

Lungs are a pair of respiratory organs located in the chest cavity protected by rib cage. They are spongy elastic and are enclosed by two membranes called Pleura. Space between the two membranes of the Pleura is filled with fluid.Pleura protects the lungs from injury. Right lung is larger than the left lungs and it is made of three lobes while the left lung has only two lobes. A pipe like structure called Trachea carries the air from Nose through Neck, thoracic cavity and opens into two…

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diagram of the human nervous system

Nerve cell is functional unit of nervous system.It has mainly two parts the Cyton and Axon.Cyton have several dendrites emerging from surface. Cyton gives rise to Axon from a triangular structure called axon hillock. Axon of nerve cells sometimes extend to 1 mt length in nerves of leg. Cyton something looks like a star so, it can be drawn from a basic star shape. Step 1: Draw two triangles superimposed as shown resembling a star. Step 2: Erase out the star shape leaving faint edges of the…

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diagram of the structure of an animal's body

Our skin is the sense organ for touch. It contains cutaneous receptors for touch. The skin consists of two main layers called epidermis and dermis. Epidermis is the layer for protection. It has outer stratum corneum or cornified layer containing dead cells, middle granular layer containing living cells and inner malpighian layer containing the cells dividing constantly. Dermis lies below the epidermis. It is made up of elastic connective tissue. It contains sweat glands, sebaceous glands…

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diagram of the male reproductional system labeled in black and white with caption below

The male reproductive system consists of a number of sex organs that are a part of the human reproductive process. The sex organs which are located in the pelvic region include a pair of testes along with accessory ducts, glands and the external genitalia.Testes are a pair of oval pinkish male primary sex organs suspended outside the abdominal cavity within a pouch called scrotum. The scrotum helps in maintaining the low temperature of the testes lower than the normal internal body…

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